Hermann biekmann



j PATENT OFFICE.,

HERMANN Britannien, on BRESLAU, GER-MANY.

ARRANGEMENT FOR CLOSING 0R OPENING BARS AT RAILROAD-CROSSINGS.`

SPECIFICATION forming part of Letters :Patent No. 578,853, dated March 16,1897.

Appnmanneanp'rn 6,1896. sriainmtscais. (roman.)

.T0 a/ZZwwm t may concern:

Be it known that I, HERMANN BIERMANN, merchant, residing at Paradiesstrasse, Breslau, in the Province of Silesia, Kingdom of Prussia, German Empire, have invented new and useful Improvements in Arrangements scction-is divided before the guard into the fields d cl' d2 by the insertion of isolatingpieces. Of these three fields the two outer ones d and d2 are connected with an alarmbell b and lamp c' by means of aconductor .L and both apparatuses must be considered to be arranged on the guard. The center eld d is, on the other-hand, connected by means of aconductor I I With stop-bar a and also with another bell b and a lamp c, which are also arranged on the stop-bar.

ters the field d or cl2, the electric current iiows from thetrain through the conductor I to the bell and lamp c', actuating both. An alarm-signal will therefore be heard, and an If a train en1 illumination of the railroad-crossing will be brought about 'as long as the train is moving in one of the outer fields d d2, While, besides,

a closing of the stop-barV is eiected as soon as the train enters the-center field d.

If the train leaves the center field d, the

4conductor I I 1Will be Wit-hout circuit, and the guard may open automatically, while the bell ceases to soundand the lamp c is extinfguished. f Aslong as the train is within one fof' the outer fields d cl2, b' and c' are actuated, but which arc at once set out of Work While the train leaves the Afields d (Z2.

IIa-vin g now described my invention, what I claim, and `desire to secure by Letters I)at ent, is A Anapparatus for automatically actuating a crossing-gate and sounding an alarm com prising a rail in three insulated sections, an alarm connected to the outside scc-tions and an electric motor controlling the gate connected to the central section, substantially as described.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

' HERMANN BIERMANN.

fitnessesz n EWALD Bonini, HERRMANN Ban'rscn.

if the conductor I is deprived of its current 

